Make comment about cri-containerd test panic more clear

It used to read "The panic for "unsupported build" should only be triggered if
the user is on a build older than RS5 or 21h1 now."

This is a bit confusing and is more clear if this was worded as "if the user
is on 21H1 or a build older than RS5".

Signed-off-by: Daniel Canter <dcanter@microsoft.com>

test/cri-containerd/main.go

@@ -152,7 +152,7 @@ func getWindowsNanoserverImage(build uint16) string {
 	// Due to some efforts in improving down-level compatibility for Windows containers (see
 	// https://techcommunity.microsoft.com/t5/containers/windows-server-2022-and-beyond-for-containers/ba-p/2712487)
 	// the ltsc2022 image should continue to work on builds ws2022 and onwards. The panic for "unsupported build"
-	// should only be triggered if the user is on a build older than RS5 or 21h1 now.
+	// should only be triggered if the user is on 21h1 or a build older than RS5 now.
 	if build > osversion.V21H2 {
 		build = osversion.V21H2
 	}